Using Authentication Agent (ssh-agent2, ssh-add2)

ssh-agent2 is a program that stores private keys for authentication. With the ssh-add2 command, you can add identities to the authentication agent. When you use the authentication agent, it will automatically be used for public-key authentication. This way, you have to type the passphrase of your private key only once to the agent. Authentication data does not have to be stored on any other machine than the local machine, and authentication passphrases or private keys never go over the network.